Gear pump having an isolator to protect its bearings

Details Gear pump having an isolator to protect its bearings Gear pump having an isolator to protect its bearings

1981-07-10

1983-10-04

Smith, Leonard E.

Rotary expansible chamber devices

With mechanical sealing

Axially movable end wall or end wall portion

F04C 1500

Patent

active

044076452

ABSTRACT:
A hydraulic device, pump or motor, useful with the hydraulic fluid used in a mine. The device comprises a housing with an impeller within the housing. A drive shaft extends through the housing and carries the impeller. There are bearings for the shaft on either side of the impeller. The improvement is an isolator member positioned between each bearing and the impeller chamber to prevent contact between the bearing and the pumped hydraulic fluid. The invention reduces the damage to hydraulic pumps and motors without increasing fire risk within the mine and helps conserve oil. This latter advantage applies to use of the invention anywhere, including use outside a mine.

REFERENCES:
patent: 2391577 (1945-12-01), Larson
patent: 2714856 (1955-08-01), Kane
patent: 2836125 (1958-05-01), Funk
patent: 3059584 (1962-10-01), Cottell
patent: 3478957 (1969-11-01), Harlin et al.

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